302 
MONTGOMERY. 
[Vol. XV. 
ferox the nucleolus consists of (i) a peripheral, less deeply 
staining portion ; and ( 2 ) of a more deeply staining and more 
highly refractive central portion, in which one large and several 
smaller vacuoles lie: “ Chose remarquable dans la vacuole 
centrale se voyait, a l’dtat frais, un granule fonce, doud d’un 
mouvement tres vif”; in this germinal vesicle a small, finely 
granular nucleolus is also present. Amoeboid movements of 
the germinal spot of Periplaneta were noticed. In the egg 
of Zilla there are from one to three homogeneous, spherical 
nucleoli, as also a large “tache principale ”; the latter is com¬ 
posed of two or three different substances, somewhat as in 
Amaurobius. 
Carnoy (’86), egg of Spiroptera strumosa: there is one large, 
central “nucleole nucleinien,” sometimes also one or two small 
“nucleoles plasmatiques ”; the former nucleolus is the only 
part of the nucleus which stains deeply with methyl green; 
it is bounded by a fine membrane, and contains eight “ baton- 
nets ” (chromosomes), so that it is comparable to a “nucleole- 
noyau.” Nematode from the stomach of Scyllium canicula: in 
the “oeufs tr&s jeunes . . . le filament nucleinien y est assez 
puissant, il parait continu. . . . Nous n’avons pu voir s’il se 
scindait d’abord en trongons ; nous croyons plutdt qu’il se 
localise par le retrait de ses anses, pour constituer un nucleole 
nucleinien pelotonne. Ainsi nait la tache de Wagner. Elle 
est toujours simple; elle se colore peu par le vert de methyle ”; 
no “ nucl6oles plasmatiques ” are present in this nucleus. In 
the egg of Filaroides mustelarum one or two “ nucleoles plas¬ 
matiques” occur; but in that of Ascaris lumbricoides such 
nucleoli are usually absent, and the chromatic filament extends 
through the whole nucleus. In Ascaris sp. (from the dog) there 
is one “nucleole plasmatique” in young eggs. 
Heathcote (’86) noticed in the egg of Julus one nucleolus with 
vacuoles ; it disappears before the production of the pole bodies. 
Knappe (’86), ovarian ova of Bufo: The nucleoli show amoe¬ 
boid movements in life, and these movements probably lead to 
the dissolution of the nucleoli, by causing the latter to first 
break into fragments, these fragments afterwards dissolving in 
the nuclear sap. 
